Clutterkill — Gary Paulsen

A sniper was loose on the Chicago strip. And the city was running scared. He killed from the rooftops, swiftly, terribly and at random. He shot secretaries, tourists, even policemen - anyone who came within range of his high-powered rifle. And he vanished after every crime. Lieutenant Ronnie Gold of Homicide had a difficult job on his hands. All he had were a few spent bullets and a vague description. He'd been going by the book of accepted police procedure, but he hadn't got very far. Now it was time to throw away the book!